Methods for assessing the wettability of coal with dust suppression solutions

Formation of coal dust during transsloading and transportation of coal leads to significant environmental pollution. One of the promising directions for reducing coal dusting is the use of reactants of various compositions. It is noted that currently in Russia there are no reliable methods for evaluating the proposed industrial reactants in terms of the efficiency of coal dust binding by them. In the present work, two methods were used to determine the wettability of coal by industrial reactants: measuring the wetting angles of the surface of coal polished sections with solutions and determining their penetration on coal dust samples. Good consistency of the obtained results was shown: reactants with contact angles with the coal surface of 77— 89° retain the shape of the initial droplet on contact with the dust. On the contrary, the solution, characterized by a contact angle of 25—27°, spreads well on the surface of the dust and completely impregnates it.

Vishnevskaya E. P., Nikolayev A. A., Dobryakova N. N., Bannikov A. A. Methods for assessing the wettability of coal with dust suppression solutions. MIAB. Mining Inf. Anal. Bull. 2020;(5):17-25. [In Russ]. DOI: 10.25018/0236-1493-2020-5-0-17-25.

E.P. Vishnevskaya¹, Engineer, e-mail: Elen.Vishnevskaia@yandex.ru,
A.A. Nikolayev¹, Cand. Sci. (Eng.), Assistant Professor, e-mail: nikolaevopr@mail.ru,
N.N. Dobryakova¹, Cand. Sci. (Eng.), Researcher, e-mail w.dobryakova@gmail.com,
A.A. Bannikov, JSC «СС «Kuzbassrazrezugol», 650054, Kemerovo, Russia, e-mail: bannikov@kru.
¹ National University of Science and Technology «MISiS», 119991, Moscow, Russia.

E.P. Vishnevskaya, e-mail: Elen.Vishnevskaia@yandex.ru

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